The concrete replacement steps of the media (quartz sand, manganese sand, etc.) of the multi-media filter are as follows:

* Note: Before disassembly, the power and water must be cut off, and the water inlet and outlet valves must be closed to reduce the pressure.

remove the water inlet and outlet pipelines of quartz sand filtration equipment and take down the control valve head;

Pull out the central pipe in the equipment and check whether the water distributor is damaged or blocked. The diameter of Huayu small tank is between 151mm and 471mm, and the central tube needs to be taken out when replacing quartz sand. The diameter of Huayu large tank is greater than 511mm, between 551mm and 1811mm, and it is unnecessary to take out the central tube when replacing it.

take out the quartz sand in the equipment and do a good job in cleaning the equipment;

Install the equipment center pipe and block it with plastic cloth to prevent quartz sand from pouring into the center pipe. It should be noted that before filling quartz sand, a small amount of water should be injected into the tank, then coarse sand should be poured first, and then fine sand should be poured, and the volume of quartz sand poured is about 81% of the tank;

after filling quartz sand, the control valve head can be installed;

after replacing the quartz sand, users can clean the quartz sand first, open the water inlet and outlet valves, and wash it first, then backwash it, and finally wash it alternately.

finally, after confirming that there is no water leakage, it can be put into use.